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What does riser rated (CMR) Ethernet cable mean? How is this different from "normal" Ethernet cable?Updated 8 days ago

All Ethernet cables will have a safety rating of some kind if it complies with the NEC/NFPA 70. CM, CMG, and CMX have no fire protection. CMR has mild flame-spreading retardance built in but is not flameproof. CMP (plenum) Ethernet cable is the most fire resistant and will not emit gas toxic smoke if it should burn.

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